Automation System
The general CAD system was development by considering a wide range of possible uses of such a system.

All of these
Structural engineering design and Electronic circuit design
Animation and graphic design
None of these
Mechanical engineering design

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Automation System
Light sensors:

work in direct sunlight
never use infrared light as light source
come in a wide variety of mounting styles
cannot be used a s limit switches.
None of these

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